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SbSI whisker/PbI2 flake mixed-dimensional van der Waals heterostructure for photodetection
Cited 25 time in
Web of Science
Cited 27 time in Scopus
- Authors
- Issue Date
- 2019-07-07
- Publisher
- Royal Society of Chemistry
- Citation
- CrystEngComm, Vol.21 No.25, pp.3779-3787
- Abstract
- Here we report for the first time a van der Waals (vdW) heterostructure formed from an individual single crystal SbSI whisker and individual PbI2 flake for photodetection. Benefiting from the millimeter-sized whisker and flake, we take advantage of the flexibility of operation and vdW junction interface between SbSI and PbI2. This mixed-dimensional heterostructure is used as an optoelectronics platform due to the larger light- harvesting cross section than the individual material. It generates photocurrent to broaden the spectral response range. The two-dimensional (2D) material acts as a current collector, while the single crystal whisker material acts as a current channel. Compared with the individual SbSI device, the vdW heterojunction device can achieve a lower dark current. As a result, our SbSI- PbI2 photodetector exhibits a responsivity of up to 26.3 mA W-1 and shows a fast response speed of similar to 12 ms. Large- area growth and scalable approaches lead to an efficient transfer strategy and heterostructure assembly. These investigations will broaden our fundamental knowledge of vdW heterostructures. This mixed-dimensional vdW heterostructure opens new opportunities for basic research of micro/nano-optoelectronics.
- ISSN
- 1466-8033
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